OVERVIEW

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be downloaded by other malware/grayware from remote sites.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

TECHNICAL DETAILS

File Size: 296,600 bytes

File Type: ELF

Memory Resident: Yes

Initial Samples Received Date: 25 May 2018

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be downloaded by the following malware/grayware from remote sites:

This Backdoor executes the following commands from a remote malicious user:

Terminate its current process

Reboot the infected device

Delays the reboot of the device

Read local file contents

Execute commands or another plugin with the following Linux Shell Commands:

/bin/sh

/bin/ash

/bin/bash

/bin/shell

Delete system files, and directories

Set its C&C proxy

Set its C&C proxy port

Set its other configuration parameters

It connects to the following websites to send and receive information:

{BLOCKED}skd4gipkm.onion/bin32/update.php

{BLOCKED}.{BLOCKED}.180.60

{BLOCKED}.{BLOCKED}.202.40

{BLOCKED}.{BLOCKED}.179.14

{BLOCKED}.{BLOCKED}.209.33

{BLOCKED}.{BLOCKED}.250.54

{BLOCKED}.{BLOCKED}.180.229

{BLOCKED}.{BLOCKED}.242.124

{BLOCKED}.{BLOCKED}.109.209

{BLOCKED}.{BLOCKED}.13.76

{BLOCKED}.{BLOCKED}.203.144

{BLOCKED}.{BLOCKED}.80.82

{BLOCKED}.{BLOCKED}.222.68

{BLOCKED}.{BLOCKED}.198.231

Information Theft

This Backdoor gathers the following data:

Mac Address

Platform Version

IP Address

Bootloader

SOLUTION

Minimum Scan Engine: 9.850

FIRST VSAPI PATTERN FILE: 14.282.07

FIRST VSAPI PATTERN DATE: 24 May 2018

VSAPI OPR PATTERN File: 14.283.00

VSAPI OPR PATTERN Date: 25 May 2018

Step 1

Scan your computer with your Trend Micro product to delete files detected as ELF_VPNFILT.B. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information: